The reaction mechanism for complex III (cytochrome bc1, coenzyme Q: cytochrome C oxidoreductase) is known as the ubiquinone ("Q") cycle. In this cycle four protons get released into the positive "P" side (inter membrane space), but only two protons get taken up from the negative "N" side (matrix). As a result, a … See more The coenzyme Q : cytochrome c – oxidoreductase, sometimes called the cytochrome bc1 complex, and at other times complex III, is the third complex in the electron transport chain (EC 1.10.2.2), playing a critical … See more In vertebrates the bc1 complex, or Complex III, contains 11 subunits: 3 respiratory subunits, 2 core proteins and 6 low-molecular weight proteins. Proteobacterial complexes may contain as few as three subunits. Table of subunit … See more There are three distinct groups of Complex III inhibitors. • Antimycin A binds to the Qi site and inhibits the transfer … See more MT-CYB: mtDNA encoded cytochrome b; mutations associated with exercise intolerance CYC1: … See more Compared to the other major proton-pumping subunits of the electron transport chain, the number of subunits found can be small, as small … See more It catalyzes the reduction of cytochrome c by oxidation of coenzyme Q (CoQ) and the concomitant pumping of 4 protons from the mitochondrial … See more A small fraction of electrons leave the electron transport chain before reaching complex IV. Premature electron leakage to oxygen results in the formation of superoxide. … See more WebSep 5, 2024 · This process receives further elaboration under Complex III. Complex III, also known as cytochrome c reductase, is made up of cytochrome b, Rieske subunits (containing two Fe-S clusters), and cytochrome c proteins. A cytochrome is a protein involved in electron transfer that contains a heme group.
UniProt
WebMar 29, 2024 · Gene ID: 27089, updated on 29-Mar-2024. Summary. This gene encodes a ubiquinone-binding protein of low molecular mass. This protein is a small core-associated protein and a subunit of ubiquinol-cytochrome c reductase complex III, which is part of the mitochondrial respiratory chain. WebThe protein encoded by this gene is located in the mitochondrion, where it is part of the ubiquinol-cytochrome c reductase complex (also known as complex III). This complex constitutes a part of the mitochondrial respiratory chain. Defects in this gene are a cause of mitochondrial complex III deficiency nuclear type 5. [provided by RefSeq, Jul 2015] trymebh
Respiratory complex I - Wikipedia
WebRespiratory nitrite reductase (NIR) has been purified from the soluble extract of denitrifying cells of Alcaligenes eutrophus strain H16 to apparent electrophoretic homogeneity. The enzyme was induced under anoxic conditions in the presence of nitrite. Purified NIR showed typical features of a cytochrome cd1-type nitrite reductase. WebMay 31, 2024 · Cytochrome c is a small globular protein containing iron porphyrin cofactor (heme c) that is covalently bound to the only polypeptide chain. The main function of cytochrome c is its involvement in the electron transport chain of the mitochondrial inner membrane. It is a key element that ensures cellular respiration. WebComplex I (reduced nicotinamide-adenine dinucleotide phosphate-coenzyme Q reductase) is the largest complex of the respiratory chain, containing about 46 polypeptides. Seven of the polypeptides are encoded by mtDNA, and mutations affecting exclusively the mtDNA genes will be considered separately under the heading of “mitochondrial genetics.” phillipas grace fanfic